3M86:
reference: Crystal structure of the cysteine protease inhibitor 2 from Entamoeba histolytica: functional convergence of a common protein fold., Casados-Vazquez LE, Lara-Gonzalez S, Brieba LG, Gene. 2011 Jan 15;471(1-2):45-52. Epub 2010 Oct 15. PMID: 20951777

This OCA Structure page
uses Jmol, developed by the Jmol Development Team (documentation).